diff options
Diffstat (limited to 'spaghetti-monster/fsm-wdt.c')
| -rw-r--r-- | spaghetti-monster/fsm-wdt.c | 197 |
1 files changed, 0 insertions, 197 deletions
diff --git a/spaghetti-monster/fsm-wdt.c b/spaghetti-monster/fsm-wdt.c deleted file mode 100644 index 64f006e..0000000 --- a/spaghetti-monster/fsm-wdt.c +++ /dev/null @@ -1,197 +0,0 @@ -// fsm-wdt.c: WDT (Watch Dog Timer) functions for SpaghettiMonster. -// Copyright (C) 2017-2023 Selene ToyKeeper -// SPDX-License-Identifier: GPL-3.0-or-later - -#pragma once - -#include <avr/interrupt.h> -#include <avr/wdt.h> - -// *** Note for the AVRXMEGA3 (1-Series, eg 816 and 817), the WDT -// is not used for time-based interrupts. A new peripheral, the -// Periodic Interrupt Timer ("PIT") is used for this purpose. - -void WDT_on() -{ - #if (ATTINY == 25) || (ATTINY == 45) || (ATTINY == 85) - // interrupt every 16ms - //cli(); // Disable interrupts - wdt_reset(); // Reset the WDT - WDTCR |= (1<<WDCE) | (1<<WDE); // Start timed sequence - WDTCR = (1<<WDIE); // Enable interrupt every 16ms - //sei(); // Enable interrupts - #elif (ATTINY == 1634) - wdt_reset(); // Reset the WDT - WDTCSR = (1<<WDIE); // Enable interrupt every 16ms - #elif defined(AVRXMEGA3) // ATTINY816, 817, etc - RTC.PITINTCTRL = RTC_PI_bm; // enable the Periodic Interrupt - while (RTC.PITSTATUS > 0) {} // make sure the register is ready to be updated - RTC.PITCTRLA = RTC_PERIOD_CYC512_gc | RTC_PITEN_bm; // Period = 16ms, enable the PI Timer - #else - #error Unrecognized MCU type - #endif -} - -#ifdef TICK_DURING_STANDBY -inline void WDT_slow() -{ - #if (ATTINY == 25) || (ATTINY == 45) || (ATTINY == 85) - // interrupt slower - //cli(); // Disable interrupts - wdt_reset(); // Reset the WDT - WDTCR |= (1<<WDCE) | (1<<WDE); // Start timed sequence - WDTCR = (1<<WDIE) | STANDBY_TICK_SPEED; // Enable interrupt every so often - //sei(); // Enable interrupts - #elif (ATTINY == 1634) - wdt_reset(); // Reset the WDT - WDTCSR = (1<<WDIE) | STANDBY_TICK_SPEED; - #elif defined(AVRXMEGA3) // ATTINY816, 817, etc - RTC.PITINTCTRL = RTC_PI_bm; // enable the Periodic Interrupt - while (RTC.PITSTATUS > 0) {} // make sure the register is ready to be updated - RTC.PITCTRLA = (1<<6) | (STANDBY_TICK_SPEED<<3) | RTC_PITEN_bm; // Set period, enable the PI Timer - #else - #error Unrecognized MCU type - #endif -} -#endif - -inline void WDT_off() -{ - #if (ATTINY == 25) || (ATTINY == 45) || (ATTINY == 85) - //cli(); // Disable interrupts - wdt_reset(); // Reset the WDT - MCUSR &= ~(1<<WDRF); // Clear Watchdog reset flag - WDTCR |= (1<<WDCE) | (1<<WDE); // Start timed sequence - WDTCR = 0x00; // Disable WDT - //sei(); // Enable interrupts - #elif (ATTINY == 1634) - cli(); // needed because CCP, below - wdt_reset(); // Reset the WDT - MCUSR &= ~(1<<WDRF); // clear watchdog reset flag - CCP = 0xD8; // enable config changes - WDTCSR = 0; // disable and clear all WDT settings - sei(); - #elif defined(AVRXMEGA3) // ATTINY816, 817, etc - while (RTC.PITSTATUS > 0) {} // make sure the register is ready to be updated - RTC.PITCTRLA = 0; // Disable the PI Timer - #else - #error Unrecognized MCU type - #endif -} - -// clock tick -- this runs every 16ms (62.5 fps) -#ifdef AVRXMEGA3 // ATTINY816, 817, etc -ISR(RTC_PIT_vect) { - RTC.PITINTFLAGS = RTC_PI_bm; // clear the PIT interrupt flag -#else -ISR(WDT_vect) { -#endif - irq_wdt = 1; // WDT event happened -} - -void WDT_inner() { - irq_wdt = 0; // WDT event handled; reset flag - - static uint8_t adc_trigger = 0; - - // cache this here to reduce ROM size, because it's volatile - uint16_t ticks_since_last = ticks_since_last_event; - // increment, but loop from max back to half - ticks_since_last = (ticks_since_last + 1) \ - | (ticks_since_last & 0x8000); - // copy back to the original - ticks_since_last_event = ticks_since_last; - - // detect and emit button change events (even during standby) - uint8_t was_pressed = button_last_state; - uint8_t pressed = button_is_pressed(); - if (was_pressed != pressed) { - go_to_standby = 0; - PCINT_inner(pressed); - } - // cache again, in case the value changed - ticks_since_last = ticks_since_last_event; - - #ifdef TICK_DURING_STANDBY - // handle standby mode specially - if (go_to_standby) { - // emit a sleep tick, and process it - emit(EV_sleep_tick, ticks_since_last); - process_emissions(); - - #ifndef USE_SLEEP_LVP - return; // no sleep LVP needed if nothing drains power while off - #else - // stop here, usually... except during the first few seconds asleep, - // and once in a while afterward for sleep LVP - if ((ticks_since_last > (8 * SLEEP_TICKS_PER_SECOND)) - && (0 != (ticks_since_last & 0x0f))) return; - - adc_trigger = 0; // make sure a measurement will happen - adc_active_now = 1; // use ADC noise reduction sleep mode - ADC_on(); // enable ADC voltage measurement functions temporarily - #endif - } - else { // button handling should only happen while awake - #endif - - // if time since last event exceeds timeout, - // append timeout to current event sequence, then - // send event to current state callback - - // callback on each timer tick - if ((current_event & B_FLAGS) == (B_CLICK | B_HOLD | B_PRESS)) { - emit(EV_tick, 0); // override tick counter while holding button - } - else { - emit(EV_tick, ticks_since_last); - } - - // user held button long enough to count as a long click? - if (current_event & B_PRESS) { - // during a "hold", send a hold event each tick, with a timer - if (current_event & B_HOLD) { - emit_current_event(ticks_since_last); - } - // has button been down long enough to become a "hold"? - // (first frame of a "hold" event) - else { - if (ticks_since_last >= HOLD_TIMEOUT) { - ticks_since_last_event = 0; - current_event |= B_HOLD; - emit_current_event(0); - } - } - } - - // event in progress, but button not currently down - else if (current_event) { - // "hold" event just ended - // no timeout required when releasing a long-press - if (current_event & B_HOLD) { - //emit_current_event(ticks_since_last); // should have been emitted by PCINT_inner() - empty_event_sequence(); - } - // end and clear event after release timeout - else if (ticks_since_last >= RELEASE_TIMEOUT) { - current_event |= B_TIMEOUT; - emit_current_event(0); - empty_event_sequence(); - } - } - - #ifdef TICK_DURING_STANDBY - } - #endif - - #if defined(USE_LVP) || defined(USE_THERMAL_REGULATION) - // enable the deferred ADC handler once in a while - if (! adc_trigger) { - ADC_start_measurement(); - adc_deferred_enable = 1; - } - // timing for the ADC handler is every 32 ticks (~2Hz) - adc_trigger = (adc_trigger + 1) & 31; - #endif -} - |